DE3743329C1 - Endoprosthesis hollow stem for cement-free implantation - Google Patents

Endoprosthesis hollow stem for cement-free implantation

Info

Publication number
DE3743329C1
DE3743329C1 DE3743329A DE3743329A DE3743329C1 DE 3743329 C1 DE3743329 C1 DE 3743329C1 DE 3743329 A DE3743329 A DE 3743329A DE 3743329 A DE3743329 A DE 3743329A DE 3743329 C1 DE3743329 C1 DE 3743329C1
Authority
DE
Germany
Prior art keywords
profiles
hollow shaft
bone
shaft
endo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE3743329A
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German (de)
Inventor
Guenter Dr-Ing Bensmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fried Krupp AG
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Fried Krupp AG
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Filing date
Publication date
Application filed by Fried Krupp AG filed Critical Fried Krupp AG
Priority to DE3743329A priority Critical patent/DE3743329C1/en
Priority to CH4717/88A priority patent/CH678146A5/de
Application granted granted Critical
Publication of DE3743329C1 publication Critical patent/DE3743329C1/en
Expired legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30003—Material related properties of the prosthesis or of a coating on the prosthesis
    • A61F2002/30004—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis
    • A61F2002/30014—Material related properties of the prosthesis or of a coating on the prosthesis the prosthesis being made from materials having different values of a given property at different locations within the same prosthesis differing in elasticity, stiffness or compressibility
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30317—The prosthesis having different structural features at different locations within the same prosthesis
    • A61F2002/30324—The prosthesis having different structural features at different locations within the same prosthesis differing in thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30329—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2002/30451—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30593—Special structural features of bone or joint prostheses not otherwise provided for hollow
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2002/30001—Additional features of subject-matter classified in A61F2/28, A61F2/30 and subgroups thereof
    • A61F2002/30316—The prosthesis having different structural features at different locations within the same prosthesis; Connections between prosthetic parts; Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30535—Special structural features of bone or joint prostheses not otherwise provided for
    • A61F2002/30602—Shaft made of a bundle of anchoring rods or bristles, e.g. fasciculate shaft
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/3094—Designing or manufacturing processes
    • A61F2/30942—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques
    • A61F2002/30955—Designing or manufacturing processes for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques using finite-element analysis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3609—Femoral heads or necks; Connections of endoprosthetic heads or necks to endoprosthetic femoral shafts
    • A61F2002/3625—Necks
    • A61F2002/3631—Necks with an integral complete or partial peripheral collar or bearing shoulder at its base
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2220/00—Fixations or connections for prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2220/0025—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements
    • A61F2220/0058—Connections or couplings between prosthetic parts, e.g. between modular parts; Connecting elements soldered or brazed or welded
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0029—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in bending or flexure capacity
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2250/00—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2250/0014—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
    • A61F2250/0036—Special features of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis differing in thickness
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00023—Titanium or titanium-based alloys, e.g. Ti-Ni alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00029—Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00035—Other metals or alloys
    • A61F2310/00095—Niobium or Nb-based alloys
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2310/00—Prostheses classified in A61F2/28 or A61F2/30 - A61F2/44 being constructed from or coated with a particular material
    • A61F2310/00005—The prosthesis being constructed from a particular material
    • A61F2310/00011—Metals or alloys
    • A61F2310/00035—Other metals or alloys
    • A61F2310/00131—Tantalum or Ta-based alloys

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

A prosthesis hollow stem which is constructed in the form of a framework of sections and which can be adapted to the flexural strength of the bone for which it is intended is described. <IMAGE>

Description

Die Erfindung betrifft einen Endo-Prothesenhohlschaft nach dem Oberbe­ griff des Anspruchs 1.The invention relates to an endo prosthetic hollow shaft according to the Oberbe handle of claim 1.

Derzeit unterscheidet man bei der Endoprothetik zwischen zwei Befesti­ gungsvarianten des Prothesenschaftes im Knochen. Entweder werden die Pro­ thesen mit Hilfe eines Knochenzementes in der vorbereiteten Knochenhöhle befestigt oder es werden sogenannte Zementlosprothesen verwendet.Currently, a distinction is made between two fasteners in arthroplasty Different versions of the prosthetic socket in the bone. Either the pro theses with the help of a bone cement in the prepared bone cavity attached or so-called cementless prostheses are used.

Bei der Zementiertechnik werden in der Regel gute Anfangserfolge erzielt, da der Zement sich der vorgearbeiteten Knochenhöhle sehr gut anpaßt. Da der Knochenzement aber nach einer gewissen Zeit versprödet, lockern die Prothesenschäfte und müssen entfernt werden.Good initial success is usually achieved with cementing technology, because the cement adapts very well to the prepared bone cavity. There the bone cement becomes brittle after a certain time, they loosen Prosthesis stems and must be removed.

Diesem Nachteil versuchte man durch die Entwicklung von Zementlosprothe­ sen zu begegnen. Bei der Zementlostechnik werden oberflächenstrukturierte Prothesengeschäfte in die möglichst genau vorgearbeitete Knochenhöhle ein­ gebracht und dort u. a. mittels Preßsitz fixiert. Danach muß, um eine dau­ erhafte Fixierung der Prothese zu erhalten, der Knochen in die Oberflä­ chenstruktur einwachsen. Da die Biegesteifigkeit eines Prothesenschaftes aber wesentlich größer ist als die Biegesteifigkeit des Knochens, in den er implantiert wurde, treten bei Belastung des Prothesenschaftes Relativ­ bewegungen zwischen Knochen und Schaft auf, was zu einer bindegewebigen Abscheidung und zu Lockerungen führt.This disadvantage was attempted through the development of cementless prosthesis to meet. With cementless technology, surface structures are used Prosthesis shops in the bone cavity that has been prepared as precisely as possible brought and there u. a. fixed by means of a press fit. After that, in order to last a to maintain the fixation of the prosthesis, the bones in the surface wax structure. Because the bending stiffness of a prosthetic socket but is much greater than the bending stiffness of the bone in the he was implanted, occur when the prosthesis socket is loaded relative Movements between the bone and shaft result in a connective tissue Separation and loosening.

Die DE 30 28 393 A1 beschreibt eine Femur-Endoprothese, bei der der Druck- und/oder der Zugschenkel im Längsverlauf den natürlichen Druck- bzw. Zugspannungstrajektorien im proximalen Bereich entsprechend gestal­ tet ist. DE 30 28 393 A1 describes a femoral endoprosthesis in which the Pressure and / or the tension leg in the longitudinal course the natural pressure or tension trajectories in the proximal area accordingly is.  

Aus der DE-OS 27 11 551 ist zwar ein räumliches Rüst- oder Fahrwerk be­ kannt, jedoch handelt es sich dabei um eine Exoprothese, d. h. eine Kon­ struktion, die nicht implantiert wird, sondern nur als Leichtbaukonstruk­ tion für künstliche Glieder gedacht ist. Diese Exoprothese besteht aus einem Gefüge aus starren, langgestreckten Elementen.From DE-OS 27 11 551 is a spatial set-up or chassis be knows, but it is an exoprosthesis, d. H. a con structure that is not implanted, but only as a lightweight construction tion is intended for artificial limbs. This exoprosthesis consists of a structure of rigid, elongated elements.

Es ist daher Aufgabe der vorliegenden Erfindung, den Prothesenhohlschaft dahingehend zu verbessern, daß Lockerungen nach der Implantation weitge­ hend ausgeschlossen werden können. Insbesondere soll die Biegesteifigkeit des Hohlschaftes im Hinblick auf die vorstehende Zielsetzung verbessert werden.It is therefore an object of the present invention, the prosthetic hollow shaft to improve that loosening after implantation can be excluded. In particular, the bending stiffness of the hollow shaft improved with regard to the above objective will.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Weiterent­ wicklungen der Erfindung sind in den Unteransprüchen beschrieben. Danach ist der gesamte Schaft in Form eines Fachwerks aus Profilen so aufgebaut, daß die Zwischenräume zwischen den Profilen so ausreichend bemessen sind, daß in den Hohlschaft eingebrachte Spongiosa in direkten Kontakt mit der Spongiosa des Knochens treten kann. Durch entsprechende Anordnung der Profile können verschiedene Querschnittsformen des Prothe­ senhohlschaftes realisiert werden. Vor allem hat die erfindungsgemäße Ausbildung den Vorteil, daß durch Auswahl der Profilformen, Profilstärken und Anordnung der Profile bzw. Dimensionierungen der Verstrebungen die Biegesteifigkeit des Schaftes der Biegesteifigkeit des Knochens an jeder Stelle weitgehend angepaßt werden kann. Dadurch werden die bisher bei Be­ lastung des Systems Knochen/Prothesenschaft auftretenden Relativbewegun­ gen vermieden. This object is solved by the features of claim 1. Further windings of the invention are described in the subclaims. After that is the entire shaft in the form of a framework made of profiles constructed so that the gaps between the profiles are sufficient are dimensioned so that inserted cancellous bone in direct Contact with the cancellous bone. By appropriate Arrangement of the profiles can have different cross-sectional shapes of the prothe hollow shaft can be realized. Above all, the invention Training the advantage that by selecting the profile shapes, profile strengths and arrangement of the profiles or dimensions of the struts Bending rigidity of the shaft of the bending rigidity of the bone at each Position can be largely adapted. As a result, the previously at Be Relative movement of the bone / prosthesis socket system avoided.  

Korrekturen der Biegesteifigkeit des Schaftes können durch Hinzufügen oder Entfernen der Verstrebungen bzw. durch Austausch von Profilen mit verschiedener Profilstärke erreicht werden. Die Berechnung der Biegestei­ figkeit solcher Prothesenschäfte ist leicht, z. B. mit der Methode der Fi­ niten-Elemente, möglich.Corrections to the bending stiffness of the shaft can be made by adding or removing the struts or by exchanging profiles with different profile strength can be achieved. The calculation of the bending arm ability of such prosthetic stems is easy, for. B. with the method of Fi elements, possible.

Besonders vorteilhaft ist es, wenn durch ausreichende Dimensionierung der Zwischenräume zwischen den Verstrebungen im Hohlschaft dafür Sorge getra­ gen wird, daß die in den Schaft eingebrachte Knochenspongiosa anwächst und auf Dauer ernährt werden kann. Im Unterschied zur bisherigen Zement­ losprothetik muß der Knochen nicht in die Oberflächenstruktur des Prothe­ senschaftes einwachsen, sondern der Knochen, d. h. die Knochenspongiosa, werden bereits während der Operation dahin gebracht, wo er benötigt wird.It is particularly advantageous if the Gaps between the struts in the hollow shaft ensure this is that the bone cancellous bone inserted into the shaft grows and can be fed permanently. In contrast to the previous cement The bone does not have to go into the surface structure of the prothe wax, but the bone, d. H. the bone cancellous bone, are brought to where it is needed during the operation.

Grundsätzlich ist es möglich, den Prothesenschaft in Fachwerkstruktur durch Aneinanderschweißen von Profilen aus bekannten Titanlegierungen aufzubauen. Es ist jedoch vorteilhafter, Profile aus kohlenstoffarmen CoCrMo-Legierungen zu verwenden, da diese sich mit geringem Aufwand schweißen lassen.Basically, it is possible to have the prosthesis stem in a half-timbered structure by welding profiles made of known titanium alloys together build up. However, it is more advantageous to use low-carbon profiles CoCrMo alloys to use, as these can be done with little effort let weld.

Für die Herstellung einer Gelenkprothese wird an den Prothesenschaft mit einem Ansatz zum Aufsetzen einer Gelenkkugel an den Prothesenhohlschaft angeschweißt. Durch die verbleibende Öffnung kann zerkleinerte Knochen­ spongiosa eingebracht werden.For the manufacture of a joint prosthesis is attached to the prosthesis socket an approach to attaching a joint ball to the hollow prosthesis shaft welded on. Through the remaining opening can be crushed bones cancellous bone.

In der Zeichnung wird in zwei Ansichten ein Ausführungsbeispiel des Ge­ gegenstandes der Erfindung dargestellt. In the drawing, an embodiment of the Ge represented subject of the invention.  

Fig. 1 zeigt den Prothesenhohlschaft 1 in Seitenansicht mit ange­ schweißtem Kragen 2 und einem Ansatz 3 zum Aufsetzen einer Gelenkkugel. Die Seitenwand 4 besteht aus Verstrebungen in Fachwerkstruktur. Fig. 1 shows the hollow prosthesis shaft 1 in side view with a welded collar 2 and a shoulder 3 for attaching a joint ball. The side wall 4 consists of struts in a framework structure.

Fig. 2 zeigt die Ansicht II-II der Prothese in Fig. 1 mit der Fachwerk­ struktur, aber ohne den Ansatz 3. Fig. 2 shows the view II-II of the prosthesis in Fig. 1 with the truss structure, but without the approach 3rd

Claims (4)

1. Endo-Prothesenhohlschaft zur zementlosen Implantation, der mit ei­ ner Gelenkkugel verbunden oder verbindbar ist, dadurch gekennzeich­ net, daß der gesamte Schaft in Form eines Fachwerkes aus Profilen aufgebaut ist und daß die Biegesteifigkeit des Hohlschaftes an je­ der Stelle der Biegesteifigkeit des Knochens durch Dimensionierung der Profilformen, Profilstärken und Anordnung der Profile nähe­ rungsweise entspricht.1. Endo-prosthesis hollow shaft for cementless implantation, which is connected or connectable with a joint ball, characterized in that the entire shaft is constructed in the form of a framework from profiles and that the bending stiffness of the hollow shaft at each point of the bending stiffness of the bone Dimensioning of the profile shapes, profile thicknesses and arrangement of the profiles approximately corresponds. 2. Endo-Prothesenhohlschaft nach Anspruch 1, dadurch gekennzeichnet, daß das Fachwerk des Schaftes aus Rundprofilen aufgebaut ist.2. Endo prosthetic hollow shaft according to claim 1, characterized in that that the framework of the shaft is constructed from round profiles. 3. Endo-Prothesenhohlschaft nach den Ansprüchen 1 oder 2, dadurch ge­ kennzeichnet, daß im Inneren des Schaftes Verstrebungen angeordnet sind.3. Endo prosthetic hollow shaft according to claims 1 or 2, characterized ge indicates that struts are arranged inside the shaft are. 4. Endo-Prothesenhohlschaft nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Profile aus CoCrMo, Titanlegierungen, Tan­ tal oder Niob bestehen.4. Endo prosthetic hollow shaft according to one of claims 1 to 3, characterized characterized in that the profiles made of CoCrMo, titanium alloys, Tan Tal or niobium exist.
DE3743329A 1987-12-21 1987-12-21 Endoprosthesis hollow stem for cement-free implantation Expired DE3743329C1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE3743329A DE3743329C1 (en) 1987-12-21 1987-12-21 Endoprosthesis hollow stem for cement-free implantation
CH4717/88A CH678146A5 (en) 1987-12-21 1988-12-21

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Application Number Priority Date Filing Date Title
DE3743329A DE3743329C1 (en) 1987-12-21 1987-12-21 Endoprosthesis hollow stem for cement-free implantation

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DE3743329C1 true DE3743329C1 (en) 1989-06-22

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102509A1 (en) * 1991-01-29 1992-07-30 Peter Brehm Knee-joint prosthesis - where femur part has bearing housing with two-part plastic bearing insert in which connecting rod can pivot but not rotate
WO1993021862A1 (en) * 1992-04-24 1993-11-11 Klaus Draenert Femoral prosthesis components to be anchored with bone cement and process for producing the same
DE4223373A1 (en) * 1992-07-16 1994-01-20 Krupp Medizintechnik Endoprosthesis shaft for knee joint - is blade shaped for anchoring purposes and has profile preventing rotation and blade-shaped vanes
EP0674886A1 (en) * 1994-02-04 1995-10-04 Società per Azioni SAMO Lightened internal articular prosthesis
EP0721767A3 (en) * 1995-01-11 1997-07-16 Biomet Deutschland Gmbh Endoprosthesis
FR2748201A1 (en) * 1996-05-03 1997-11-07 Thierry Chataigner Prosthetic medullary nail bone implant
DE10308141A1 (en) * 2003-02-26 2004-10-14 Aesculap Ag & Co. Kg Extension sleeve for modular built-in joint prosthesis, has sleeve wall preferably formed with circumferential grooves to minimize sleeve flexural rigidity
CN101584614B (en) * 2009-07-02 2011-06-15 北京市春立正达医疗器械股份有限公司 Femur upper segment hip-joint prosthesis
US10278823B1 (en) * 2018-04-18 2019-05-07 ZSFab, Inc. Lightweight femoral stem for hip implants

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711551A1 (en) * 1977-03-17 1978-09-21 Blatchford & Sons Ltd Load-bearing, artificial limb - is a composite hollow frame of rigid, fibre reinforced, plastics esp. carbon fibre reinforced epoxy! resin
DE2941266A1 (en) * 1978-10-11 1980-05-22 Tornier Sa Hip joint endoprosthesis
DE3028393A1 (en) * 1980-07-26 1982-02-11 Efstathios Thessaloniki Koutrolikos Surgical implant used as femoral endoprosthesis - has neck portion formed by medial and lateral stems joined by transverse rib
DE3120147A1 (en) * 1981-05-18 1982-12-09 Mecron Medizinische Produkte Gmbh, 1000 Berlin "HIP JOINT PROSTHESIS"

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2711551A1 (en) * 1977-03-17 1978-09-21 Blatchford & Sons Ltd Load-bearing, artificial limb - is a composite hollow frame of rigid, fibre reinforced, plastics esp. carbon fibre reinforced epoxy! resin
DE2941266A1 (en) * 1978-10-11 1980-05-22 Tornier Sa Hip joint endoprosthesis
DE3028393A1 (en) * 1980-07-26 1982-02-11 Efstathios Thessaloniki Koutrolikos Surgical implant used as femoral endoprosthesis - has neck portion formed by medial and lateral stems joined by transverse rib
DE3120147A1 (en) * 1981-05-18 1982-12-09 Mecron Medizinische Produkte Gmbh, 1000 Berlin "HIP JOINT PROSTHESIS"

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Prospekt der Fa.orthoplant Endoprothetik GmbH, "Produktmitteilung orthoplant TEP Typ 11" 1984/85 *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4102509A1 (en) * 1991-01-29 1992-07-30 Peter Brehm Knee-joint prosthesis - where femur part has bearing housing with two-part plastic bearing insert in which connecting rod can pivot but not rotate
WO1993021862A1 (en) * 1992-04-24 1993-11-11 Klaus Draenert Femoral prosthesis components to be anchored with bone cement and process for producing the same
DE4223373A1 (en) * 1992-07-16 1994-01-20 Krupp Medizintechnik Endoprosthesis shaft for knee joint - is blade shaped for anchoring purposes and has profile preventing rotation and blade-shaped vanes
EP0674886A1 (en) * 1994-02-04 1995-10-04 Società per Azioni SAMO Lightened internal articular prosthesis
EP0721767A3 (en) * 1995-01-11 1997-07-16 Biomet Deutschland Gmbh Endoprosthesis
FR2748201A1 (en) * 1996-05-03 1997-11-07 Thierry Chataigner Prosthetic medullary nail bone implant
DE10308141A1 (en) * 2003-02-26 2004-10-14 Aesculap Ag & Co. Kg Extension sleeve for modular built-in joint prosthesis, has sleeve wall preferably formed with circumferential grooves to minimize sleeve flexural rigidity
DE10308141A8 (en) * 2003-02-26 2005-02-03 Aesculap Ag & Co. Kg Extension sleeve for a modular joint prosthesis
DE10308141B4 (en) * 2003-02-26 2005-04-07 Aesculap Ag & Co. Kg Extension sleeve for a modular joint prosthesis
CN101584614B (en) * 2009-07-02 2011-06-15 北京市春立正达医疗器械股份有限公司 Femur upper segment hip-joint prosthesis
US10278823B1 (en) * 2018-04-18 2019-05-07 ZSFab, Inc. Lightweight femoral stem for hip implants
CN110384573A (en) * 2018-04-18 2019-10-29 智塑健康科技有限公司 Lightweight femoral stem for hip implant
CN110384573B (en) * 2018-04-18 2020-09-22 智塑健康科技有限公司 Lightweight femoral stem for hip implants
US10813766B2 (en) 2018-04-18 2020-10-27 ZSFab, Inc. Methods of manufacturing and designing a lightweight femoral stem for hip implants

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